git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/extended.c

   1 /* extended.c - ldap backend extended routines */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2003-2007 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* ACKNOWLEDGEMENTS:
  17  * This work was initially developed by the Howard Chu for inclusion
  18  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  19  * Masarati.
  20  */
  21
  22 #include "portable.h"
  23
  24 #include <stdio.h>
  25 #include <ac/string.h>
  26
  27 #include "slap.h"
  28 #include "back-ldap.h"
  29 #include "lber_pvt.h"
  30
  31 typedef int (ldap_back_exop_f)( Operation *op, SlapReply *rs, ldapconn_t **lc );
  32
  33 static ldap_back_exop_f ldap_back_exop_passwd;
  34 static ldap_back_exop_f ldap_back_exop_generic;
  35
  36 static struct exop {
  37         struct berval           oid;
  38         ldap_back_exop_f        *extended;
  39 } exop_table[] = {
  40         { BER_BVC(LDAP_EXOP_MODIFY_PASSWD),     ldap_back_exop_passwd },
  41         { BER_BVNULL, NULL }
  42 };
  43
  44 static int
  45 ldap_back_extended_one( Operation *op, SlapReply *rs, ldap_back_exop_f exop )
  46 {
  47         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
  48
  49         ldapconn_t      *lc = NULL;
  50         LDAPControl     **ctrls = NULL, **oldctrls = NULL;
  51         int             rc;
  52
  53         /* FIXME: this needs to be called here, so it is
  54          * called twice; maybe we could avoid the
  55          * ldap_back_dobind() call inside each extended()
  56          * call ... */
  57         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
  58                 return -1;
  59         }
  60
  61         ctrls = op->o_ctrls;
  62         if ( ldap_back_controls_add( op, rs, lc, &ctrls ) )
  63         {
  64                 op->o_ctrls = oldctrls;
  65                 send_ldap_extended( op, rs );
  66                 rs->sr_text = NULL;
  67                 /* otherwise frontend resends result */
  68                 rc = rs->sr_err = SLAPD_ABANDON;
  69                 goto done;
  70         }
  71
  72         op->o_ctrls = ctrls;
  73         rc = exop( op, rs, &lc );
  74
  75         op->o_ctrls = oldctrls;
  76         (void)ldap_back_controls_free( op, rs, &ctrls );
  77
  78 done:;
  79         if ( lc != NULL ) {
  80                 ldap_back_release_conn( li, lc );
  81         }
  82
  83         return rc;
  84 }
  85
  86 int
  87 ldap_back_extended(
  88                 Operation       *op,
  89                 SlapReply       *rs )
  90 {
  91         int     i;
  92
  93         for ( i = 0; exop_table[i].extended != NULL; i++ ) {
  94                 if ( bvmatch( &exop_table[i].oid, &op->oq_extended.rs_reqoid ) )
  95                 {
  96                         return ldap_back_extended_one( op, rs, exop_table[i].extended );
  97                 }
  98         }
  99
 100         /* if we get here, the exop is known; the best that we can do
 101          * is pass it thru as is */
 102         /* FIXME: maybe a list of OIDs to pass thru would be safer */
 103         return ldap_back_extended_one( op, rs, ldap_back_exop_generic );
 104 }
 105
 106 static int
 107 ldap_back_exop_passwd(
 108         Operation       *op,
 109         SlapReply       *rs,
 110         ldapconn_t      **lcp )
 111 {
 112         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 113
 114         ldapconn_t      *lc = *lcp;
 115         req_pwdexop_s   *qpw = &op->oq_pwdexop;
 116         LDAPMessage     *res;
 117         ber_int_t       msgid;
 118         int             rc, isproxy, freedn = 0;
 119         int             do_retry = 1;
 120         char            *text = NULL;
 121         struct berval   dn = op->o_req_dn,
 122                         ndn = op->o_req_ndn;
 123
 124         assert( lc != NULL );
 125         assert( rs->sr_ctrls == NULL );
 126
 127         if ( BER_BVISNULL( &ndn ) && op->ore_reqdata != NULL ) {
 128                 /* NOTE: most of this code is mutuated
 129                  * from slap_passwd_parse(); we can't call
 130                  * that function since now the request data
 131                  * has been destroyed by NULL-terminating
 132                  * the bervals.  Luckily enough, we only need
 133                  * the first berval... */
 134
 135                 ber_tag_t tag;
 136                 ber_len_t len = -1;
 137                 BerElementBuffer berbuf;
 138                 BerElement *ber = (BerElement *)&berbuf;
 139
 140                 struct berval   tmpid = BER_BVNULL;
 141
 142                 if ( op->ore_reqdata->bv_len == 0 ) {
 143                         return LDAP_PROTOCOL_ERROR;
 144                 }
 145
 146                 /* ber_init2 uses reqdata directly, doesn't allocate new buffers */
 147                 ber_init2( ber, op->ore_reqdata, 0 );
 148
 149                 tag = ber_scanf( ber, "{" /*}*/ );
 150
 151                 if ( tag == LBER_ERROR ) {
 152                         return LDAP_PROTOCOL_ERROR;
 153                 }
 154
 155                 tag = ber_peek_tag( ber, &len );
 156                 if ( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_ID ) {
 157                         tag = ber_scanf( ber, "m", &tmpid );
 158
 159                         if ( tag == LBER_ERROR ) {
 160                                 return LDAP_PROTOCOL_ERROR;
 161                         }
 162                 }
 163
 164                 if ( !BER_BVISEMPTY( &tmpid ) ) {
 165                         rs->sr_err = dnPrettyNormal( NULL, &tmpid, &dn,
 166                                 &ndn, op->o_tmpmemctx );
 167                         if ( rs->sr_err != LDAP_SUCCESS ) {
 168                                 /* should have been successfully parsed earlier! */
 169                                 return rs->sr_err;
 170                         }
 171                         freedn = 1;
 172
 173                 } else {
 174                         dn = op->o_dn;
 175                         ndn = op->o_ndn;
 176                 }
 177         }
 178
 179         isproxy = ber_bvcmp( &ndn, &op->o_ndn );
 180
 181         Debug( LDAP_DEBUG_ARGS, "==> ldap_back_exop_passwd(\"%s\")%s\n",
 182                 dn.bv_val, isproxy ? " (proxy)" : "", 0 );
 183
 184 retry:
 185         rc = ldap_passwd( lc->lc_ld, isproxy ? &dn : NULL,
 186                 qpw->rs_old.bv_val ? &qpw->rs_old : NULL,
 187                 qpw->rs_new.bv_val ? &qpw->rs_new : NULL,
 188                 op->o_ctrls, NULL, &msgid );
 189
 190         if ( rc == LDAP_SUCCESS ) {
 191                 /* TODO: set timeout? */
 192                 if ( ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, NULL, &res ) == -1 ) {
 193                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER, &rc );
 194                         rs->sr_err = rc;
 195
 196                 } else {
 197                         /* only touch when activity actually took place... */
 198                         if ( li->li_idle_timeout && lc ) {
 199                                 lc->lc_time = op->o_time;
 200                         }
 201
 202                         /* sigh. parse twice, because parse_passwd
 203                          * doesn't give us the err / match / msg info.
 204                          */
 205                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 206                                         (char **)&rs->sr_matched,
 207                                         &text,
 208                                         NULL, &rs->sr_ctrls, 0 );
 209
 210                         if ( rc == LDAP_SUCCESS ) {
 211                                 if ( rs->sr_err == LDAP_SUCCESS ) {
 212                                         struct berval   newpw;
 213
 214                                         /* this never happens because
 215                                          * the frontend is generating
 216                                          * the new password, so when
 217                                          * the passwd exop is proxied,
 218                                          * it never delegates password
 219                                          * generation to the remote server
 220                                          */
 221                                         rc = ldap_parse_passwd( lc->lc_ld, res,
 222                                                         &newpw );
 223                                         if ( rc == LDAP_SUCCESS &&
 224                                                         !BER_BVISNULL( &newpw ) )
 225                                         {
 226                                                 rs->sr_type = REP_EXTENDED;
 227                                                 rs->sr_rspdata = slap_passwd_return( &newpw );
 228                                                 free( newpw.bv_val );
 229                                         }
 230
 231                                 } else {
 232                                         rc = rs->sr_err;
 233                                 }
 234                         }
 235                         ldap_msgfree( res );
 236                 }
 237         }
 238
 239         if ( rc != LDAP_SUCCESS ) {
 240                 rs->sr_err = slap_map_api2result( rs );
 241                 if ( rs->sr_err == LDAP_UNAVAILABLE && do_retry ) {
 242                         do_retry = 0;
 243                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 244                                 goto retry;
 245                         }
 246                 }
 247
 248                 if ( LDAP_BACK_QUARANTINE( li ) ) {
 249                         ldap_back_quarantine( op, rs );
 250                 }
 251
 252                 if ( text ) rs->sr_text = text;
 253                 send_ldap_extended( op, rs );
 254                 /* otherwise frontend resends result */
 255                 rc = rs->sr_err = SLAPD_ABANDON;
 256
 257         } else if ( LDAP_BACK_QUARANTINE( li ) ) {
 258                 ldap_back_quarantine( op, rs );
 259         }
 260
 261         if ( freedn ) {
 262                 op->o_tmpfree( dn.bv_val, op->o_tmpmemctx );
 263                 op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
 264         }
 265
 266         /* these have to be freed anyway... */
 267         if ( rs->sr_matched ) {
 268                 free( (char *)rs->sr_matched );
 269                 rs->sr_matched = NULL;
 270         }
 271
 272         if ( rs->sr_ctrls ) {
 273                 ldap_controls_free( rs->sr_ctrls );
 274                 rs->sr_ctrls = NULL;
 275         }
 276
 277         if ( text ) {
 278                 free( text );
 279                 rs->sr_text = NULL;
 280         }
 281
 282         /* in case, cleanup handler */
 283         if ( lc == NULL ) {
 284                 *lcp = NULL;
 285         }
 286
 287         return rc;
 288 }
 289
 290 static int
 291 ldap_back_exop_generic(
 292         Operation       *op,
 293         SlapReply       *rs,
 294         ldapconn_t      **lcp )
 295 {
 296         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 297
 298         ldapconn_t      *lc = *lcp;
 299         LDAPMessage     *res;
 300         ber_int_t       msgid;
 301         int             rc;
 302         int             do_retry = 1;
 303         char            *text = NULL;
 304
 305         assert( lc != NULL );
 306         assert( rs->sr_ctrls == NULL );
 307
 308         Debug( LDAP_DEBUG_ARGS, "==> ldap_back_exop_generic(%s, \"%s\")\n",
 309                 op->ore_reqoid.bv_val, op->o_req_dn.bv_val, 0 );
 310
 311 retry:
 312         rc = ldap_extended_operation( lc->lc_ld,
 313                 op->ore_reqoid.bv_val, op->ore_reqdata,
 314                 op->o_ctrls, NULL, &msgid );
 315
 316         if ( rc == LDAP_SUCCESS ) {
 317                 /* TODO: set timeout? */
 318                 if ( ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, NULL, &res ) == -1 ) {
 319                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER, &rc );
 320                         rs->sr_err = rc;
 321
 322                 } else {
 323                         /* only touch when activity actually took place... */
 324                         if ( li->li_idle_timeout && lc ) {
 325                                 lc->lc_time = op->o_time;
 326                         }
 327
 328                         /* sigh. parse twice, because parse_passwd
 329                          * doesn't give us the err / match / msg info.
 330                          */
 331                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 332                                         (char **)&rs->sr_matched,
 333                                         &text,
 334                                         NULL, &rs->sr_ctrls, 0 );
 335                         if ( rc == LDAP_SUCCESS ) {
 336                                 if ( rs->sr_err == LDAP_SUCCESS ) {
 337                                         rc = ldap_parse_extended_result( lc->lc_ld, res,
 338                                                         (char **)&rs->sr_rspoid, &rs->sr_rspdata, 0 );
 339                                         if ( rc == LDAP_SUCCESS ) {
 340                                                 rs->sr_type = REP_EXTENDED;
 341                                         }
 342
 343                                 } else {
 344                                         rc = rs->sr_err;
 345                                 }
 346                         }
 347                         ldap_msgfree( res );
 348                 }
 349         }
 350
 351         if ( rc != LDAP_SUCCESS ) {
 352                 rs->sr_err = slap_map_api2result( rs );
 353                 if ( rs->sr_err == LDAP_UNAVAILABLE && do_retry ) {
 354                         do_retry = 0;
 355                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 356                                 goto retry;
 357                         }
 358                 }
 359
 360                 if ( LDAP_BACK_QUARANTINE( li ) ) {
 361                         ldap_back_quarantine( op, rs );
 362                 }
 363
 364                 if ( text ) rs->sr_text = text;
 365                 send_ldap_extended( op, rs );
 366                 /* otherwise frontend resends result */
 367                 rc = rs->sr_err = SLAPD_ABANDON;
 368
 369         } else if ( LDAP_BACK_QUARANTINE( li ) ) {
 370                 ldap_back_quarantine( op, rs );
 371         }
 372
 373         /* these have to be freed anyway... */
 374         if ( rs->sr_matched ) {
 375                 free( (char *)rs->sr_matched );
 376                 rs->sr_matched = NULL;
 377         }
 378
 379         if ( rs->sr_ctrls ) {
 380                 ldap_controls_free( rs->sr_ctrls );
 381                 rs->sr_ctrls = NULL;
 382         }
 383
 384         if ( text ) {
 385                 free( text );
 386                 rs->sr_text = NULL;
 387         }
 388
 389         /* in case, cleanup handler */
 390         if ( lc == NULL ) {
 391                 *lcp = NULL;
 392         }
 393
 394         return rc;
 395 }
 396